package org.example.filter;

//检查是否登录

import com.alibaba.fastjson.JSON;
import lombok.extern.slf4j.Slf4j;
import org.example.common.BaseContext;
import org.example.common.R;
import org.springframework.util.AntPathMatcher;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebFilter(filterName = "loginCheckFilter",urlPatterns = "/*")
@Slf4j
public class LoginCheckFilter implements Filter {

    public  static  final AntPathMatcher PATH_MATCHER =new AntPathMatcher();
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request=(HttpServletRequest) servletRequest;
        HttpServletResponse response =(HttpServletResponse) servletResponse;

        String requestURI =request.getRequestURI();
        log.info("拦截到请求：{}",request.getRequestURI());
        String[] urls =new String[]{
                "/employee/login",
                "/employee/logout",
                "/backend/**",
                "/front/**",
                "/common/**",
                "/user/sendMsg",
                "/user/login"
        };

        boolean check= check(urls,requestURI);
        if(check){
            log.info("本次请求{}不需要处理",requestURI);
            filterChain.doFilter(request,response);
            return;
        }

        if(request.getSession().getAttribute("employee")!=null){
            log.info("用户已登录，用户ID为：{}",request.getSession().getAttribute("employee"));;
//            Long id = Thread.currentThread().getId();
//            log.info("线程id为{}", id);

            Long emId =(Long) request.getSession().getAttribute("employee");
            BaseContext.setCurrentId(emId);
            filterChain.doFilter(request,response);
            return;
        }

        if(request.getSession().getAttribute("user")!=null){
            log.info("用户已登录，用户ID为：{}",request.getSession().getAttribute("user"));;
//            Long id = Thread.currentThread().getId();
//            log.info("线程id为{}", id);

            Long userid =(Long) request.getSession().getAttribute("user");
            BaseContext.setCurrentId(userid);
            filterChain.doFilter(request,response);
            return;
        }

        log.info("用户未登录");


        response.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN")));

//        log.info("拦截到请求：{}",request.getRequestURI());
//        filterChain.doFilter(request,response);
    }

    public boolean check(String[] urls,String requestURI){
        for(String url:urls){
            boolean match=PATH_MATCHER.match(url,requestURI);
            if(match){
                return true;
            }

        }
        return false;
    }
}
